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Dec. 2, 1930. R, BURKE 1,783,826

RACK ROD ASSEMBLY FOR SCALES Filed Jan. '7, 1929 INVENTOR Patented Dec. 2, I930 UNITED STATES PATENT OFFICE 7 ROBERT J. BURKE OF LATROIBE, PENNSYLVANIA, ASSIGNOR T LINCOLN SCALE CORE POBATION, OF L.ATBOIBE, PENNSYLVANIA, A CORPORATION OF DELAWARE RACK-ROD ASSEMBLY FOR source 7 Application filed January 7, 1929. Serial No.'330,7 79.

a shaft, and to this shaft there is connected 7 a drum pinion.

the axes of the drum pinion and rack rod be The drum pinion is actuated by'a rack rod connected at one end to the main scale lever. V

The teeth on the pinion and rack are designed substantially without back lash. In

order toprevent binding, it is necessary that truly perpendicular. Occasionally in assembling the scale, or while in transit or use, this perpendicular relation is not maintained, which causes the parts to bind. I

My invention provides means for adjusting the parts in'a simple manner so that they will run freely; This is accomplished by providing for lateral adjustment of the rack rod on its support.

In the accompanying drawing Which illustrates the present preferred embodiment of my invention, I Figure 1 is a side elevation, parts being shown in section, and Y Figure 2 is a front elevation. Referring to the drawing, a bearing block 2 is pivotally mountedon the main scale lever (not shown) by meansof a pin 3 and cotter V I pins. A bracket 5 is adjustably supported on the bearing block. As shown, the bracket 5is provided with an elongated slot 6 which receives screws 7 secured to the bearing block.

A rack rod 8 is secured to the bracket by nuts 9, and at'its upper end it carries a rack 10 a which is fastened to the rack rod by rivets 11.

The teeth 12 of the rack mesh with a drum pinion 13 secured to a drum shaft 14.

The bracket 5 is provided with the usual weight 15. If the rack and pinion show any tendency to bind, the screws 7 are loosened,

the bracket 5 is moved laterally of the bearing block 2, and the screws are again tight- I have illustrated and described the pres- 'ent preferred embodiment of my invention.

It is to be understood, however, that the in vention may be otherwise embodied without departing from the spirit of the invention or the scope of the following claims.

I claim 1. A rack rod assembly comprising a bearing'block, a bracket supported by said block,

a rack rod carried by said bracket, and means for adjusting'said bracket laterally ofisaid bearing block.

2. A rackrodv assemblycomprising a bearing. block, a bracket supported by said block, av rack rod carried by said bracket, said bracket and block being provided with a cooperating slot and fastening means for lateraladjustment of said bracket and block. I. 3. rack rod assembly comprising a bearing block, abracke't supported thereby, and a rack rod carried by said bracket, said bracket having an elongated slot which receives a fastening means secured to said bearing block for lateral adjustment of said bracket and block.

4. In a drum scale, a drum pinion, a'rack adapted to actuate the pinion, a support for the rack adjacent the end thereof opposite the pinion, and means for adjusting the rack laterally of the support.

5. In a drum scale, a drum pinion, a rack adapted to actuate the pinion, a support for the rack adjacent the end thereof opposite the pinion, and means for adjusting said opposite end of the' rack laterally of the support and longitudinally of the drum pinion axis, and substantially parallel to said axis.

' 6. In a drum scale, a bearing block, a bracket supported by said block, a drum pinion, a rack carried by said bracket and adapted to actuate said pinion, and means for adjusting said bracket laterally of said bear;

ing block and longitudinally of the drum pinion axis.

' I 9 In testimony whereof I have hereunto set 

